“Should trees have standing?” is the question law professor Christopher D. Stone posed in a 1972 law review article arguing that forests, rivers, and other natural features should be able to sue in their own names, represented by court-appointed guardians, just as corporations and ships already can. The idea lost at the U.S. Supreme Court the same year it was published, but it has since been written into Ecuador’s constitution, applied to a specific river in New Zealand, and used by tribal nations in the United States to file lawsuits with ecosystems as named plaintiffs. Federal courts in the U.S. still require a human injury before anyone can sue over environmental harm, so Stone’s proposal remains unrealized in American federal law more than fifty years after he made it.
What Stone Actually Proposed
Christopher D. Stone, a law professor at the University of Southern California, published “Should Trees Have Standing? Toward Legal Rights for Natural Objects” in the Southern California Law Review in 1972. The timing was deliberate. The Supreme Court was about to hear a case involving a proposed ski resort in California’s Mineral King Valley, and Stone wanted his argument before the justices decided it.
His central claim was that legal rights are not fixed categories handed down from nature. The law has repeatedly expanded who counts as a rights-holder. Enslaved people, women, children, and eventually corporations all gained legal recognition they previously lacked. Each expansion met resistance from people who found the idea absurd, until it became ordinary. Stone argued that extending rights to natural objects was the next step in that progression.
He set out three criteria for what it means for something to hold legal rights. The entity must be able to institute legal actions on its own behalf. Courts must consider injury to the entity itself when deciding cases. And any legal relief must run to the benefit of the entity, not just to the humans connected to it. Under the existing system, a polluted river has no legal standing of its own. If anyone sues, it is a human claiming personal harm, damages go to that human plaintiff, and the river’s restoration is incidental at best.
Stone proposed flipping that framework. A river or forest would become a legal person capable of suing through a court-appointed guardian. Damages would go into a trust fund administered for the natural object’s benefit, spent on restoration, cleanup, or preservation rather than compensating a human plaintiff. Criminal fines against polluters would flow into the same fund rather than into general government revenue.
Why the Idea Was Necessary: The Standing Barrier
The reason Stone needed to propose anything at all comes down to a procedural gatekeeping rule called standing. Article III of the Constitution limits federal courts to deciding actual cases and controversies, which means a plaintiff cannot walk into court with a general grievance about the world.
The Supreme Court formalized the modern test in Lujan v. Defenders of Wildlife in 1992. A plaintiff must show an injury in fact that is concrete and particularized, a causal link between that injury and the defendant’s conduct, and a likelihood that a favorable decision will redress the harm. The test is built around human harm. If a chemical company dumps waste into a river and no one who uses that river comes forward with a personal injury claim, the river has no voice in court. Environmental organizations can sometimes sue on behalf of their members, but only when individual members can point to a cognizable personal injury. Environmental destruction without a direct human victim often goes unaddressed.
That gap is what Stone wanted to close. If the river itself were a legal person, pollution would constitute a direct injury to it. A guardian could demonstrate causation and seek relief that runs to the river’s benefit. The standing problem disappears.
Sierra Club v. Morton and the Douglas Dissent
The Supreme Court confronted these ideas in Sierra Club v. Morton, decided in April 1972. The case involved Walt Disney Enterprises’ plan to build a large ski resort in Mineral King Valley, a wilderness area near Sequoia National Park. The Sierra Club sued to block the development, arguing the project would cause irreparable environmental damage.
The majority ruled against the Sierra Club, but not on the environmental merits. The Court held that the organization had failed to allege that it or its members would be personally affected by the development. Nowhere in its filings did the Sierra Club claim that its members actually used Mineral King Valley in any way the Disney project would disrupt. Without that individualized harm, the organization lacked standing. The case was a textbook demonstration of the barrier Stone had identified.
Justice William O. Douglas wrote a dissent that has become more famous than the majority opinion. Drawing directly on Stone’s article, Douglas argued that environmental objects should have standing to sue for their own preservation, and that the case would be “more properly labeled as Mineral King v. Morton,” with the valley itself as the plaintiff. “The voice of the inanimate object,” he wrote, “should not be stilled.” Valleys, rivers, lakes, beaches, and groves of trees should be recognized as parties in litigation, just as ships and corporations already were, so that all forms of life within an ecosystem would be represented in court rather than only the human users who happen to have standing.
The dissent did not become law. It did give the rights-of-nature movement a constitutional vocabulary it has used ever since, and it remains the most cited judicial statement in favor of environmental personhood.
How Guardianship Would Work
The obvious objection to environmental personhood is that a river cannot hire a lawyer. Stone answered this by borrowing from an existing legal mechanism: guardianship. Courts routinely appoint guardians to represent people who cannot represent themselves, including young children, individuals with severe cognitive disabilities, and the estates of deceased persons. A natural object would be represented the same way.
Under Stone’s framework, anyone who perceived a natural object to be endangered could apply to a court for creation of a guardianship. The court would appoint a representative, perhaps an environmental scientist, a conservation organization, or a specialized attorney, holding a fiduciary duty to act solely in the interest of the natural entity. That guardian would have authority to file lawsuits, sign legal documents, present evidence, and negotiate settlements on behalf of the ecosystem.
Damages would be measured differently than in conventional tort law. Instead of calculating lost profits or diminished property values for human plaintiffs, the relevant measure would be the cost of making the environment whole: dredging a polluted waterway, restocking depleted fisheries, or restoring damaged habitat. Those funds would flow into a trust administered by the guardian and dedicated to preserving and restoring the natural object.
Stone acknowledged the complications. Who decides which guardian candidates are genuinely aligned with the ecosystem’s interests? What happens when two groups claim to speak for the same river and disagree about what its interests require? He argued these problems were no more severe than the conflicts that already arise in corporate governance and child custody proceedings.
Where the Idea Has Become Law
Stone’s proposal remained theoretical in the United States, but other jurisdictions eventually put it into practice.
Ecuador
Ecuador became the first nation to constitutionalize the rights of nature in 2008. Its constitution declares that nature “has the right to exist, persist, maintain and regenerate its vital cycles, structure, functions and its processes in evolution.” Ecuadorian courts have enforced these provisions in real disputes. In 2021, the Constitutional Court applied the rights of nature to block mining concessions in the Los Cedros cloud forest, ruling that extractive activities threatening the ecosystem’s rights must be halted and that mining permits in the area must be cancelled.
New Zealand
New Zealand took a different route, granting legal personhood to a specific natural feature rather than to nature generally. The Te Awa Tupua Act of 2017 declared the Whanganui River a legal person with its own rights, duties, and liabilities. The law resolved a dispute between the New Zealand government and the Whanganui iwi that had lasted more than 140 years. The river is now represented by two guardians called Te Pou Tupua, described in the statute as “the human face of Te Awa Tupua.” One is nominated by the Whanganui iwi and one by the Crown. Their functions include acting and speaking on behalf of the river and protecting its health and well-being.
Bolivia and India
Bolivia enacted its Law of the Rights of Mother Earth in 2010, recognizing the earth as a living being with rights to diversity, freedom from contamination, and maintenance of its natural systems. Enforcement has lagged; the office responsible for defending those rights has never been fully established. In 2017, the Uttarakhand High Court in India declared the Ganges and Yamuna rivers to be living entities with legal rights, but the Indian Supreme Court stayed the ruling after questions arose about who would bear liability for flooding and pollution.
United States: Tribal and Local Action
Federal courts have not adopted Stone’s framework. Some local governments and tribal nations have moved in that direction through ordinances and resolutions.
Communities in Pennsylvania and elsewhere have passed local laws recognizing the rights of watersheds and ecosystems to remain free from pollution and industrial degradation. The most prominent example was the Lake Erie Bill of Rights, passed by voters in Toledo, Ohio in 2019, which granted the lake the right to “exist, flourish, and naturally evolve.” The measure was challenged in federal court, and Ohio’s legislature responded by amending a budget bill to declare that “nature or any ecosystem does not have standing to participate in or bring an action in any court of common pleas,” gutting the local measure before it could be tested.
Tribal nations have gone further. In 2018, the White Earth Band of Ojibwe adopted a resolution recognizing the rights of manoomin (wild rice), declaring that it “possesses inherent rights to exist, flourish, regenerate, and evolve, as well as inherent rights to restoration, recovery, and preservation.” In 2021, the White Earth Band filed a lawsuit in tribal court, Manoomin v. Minnesota Department of Natural Resources, challenging the state’s permit for Enbridge’s Line 3 oil pipeline on the grounds that it violated manoomin’s rights by endangering water quality and wetland ecosystems within treaty territories. It was the first time a natural feature was named as a plaintiff in a U.S. legal proceeding under a rights-of-nature framework.
The Serious Objections
The rights-of-nature movement has attracted substantive legal criticism, and the objections go beyond the instinctive reaction that giving rights to a tree sounds strange.
The most fundamental challenge is definitional. Ecosystems do not have fixed boundaries the way a human body or a corporate charter does. Where does a river’s legal personhood begin and end? Does it include the watershed, the groundwater, the species that depend on it? Depending on where the line is drawn, the same development project might violate one entity’s rights while benefiting another’s.
Representation raises equally difficult questions. When multiple groups claim to speak for the same natural feature and disagree about what its interests require, courts must arbitrate between competing representational claims. In Ecuador, courts have sometimes faced conflicting lawsuits brought by different parties all purporting to defend the same ecosystem. Critics argue the outcomes end up reflecting whichever human faction gains the guardian role rather than anything that could meaningfully be called the ecosystem’s own interests.
Property rights are another collision point. If a forest has a legal right to exist and flourish, does that override a landowner’s right to clear timber? Rights-of-nature frameworks generally say yes, which creates tension with constitutional protections for private property that no jurisdiction has fully resolved. Opponents argue that existing environmental regulations, which restrict land use without requiring the fiction of environmental personhood, achieve the same goals with fewer conceptual problems.
Finally, there is a democratic objection. Environmental policy involves tradeoffs between conservation, economic development, energy production, and community welfare. Critics contend those tradeoffs are better handled through legislatures and regulatory agencies accountable to voters than through courts adjudicating the rights of entities that cannot articulate preferences. Granting legal rights to nature, in this view, transfers policy decisions from democratic institutions to judges interpreting vague rights provisions.
Where the Debate Stands
More than fifty years after Stone posed his question, the answer remains contested. No federal court has granted standing to a natural object, and the Lujan framework continues to require a human injury as the entry ticket to federal litigation. The idea has proved more resilient than its early critics expected. Ecuador enforces constitutional rights of nature against mining companies. New Zealand’s river has legal guardians with statutory authority. Tribal nations in the United States are filing lawsuits with ecosystems as named plaintiffs.
The practical results have been mixed, and the theoretical objections remain serious. Stone’s core insight has held up: the circle of entities recognized as legal persons has expanded repeatedly throughout history, and each expansion was resisted by people who found it unthinkable until it happened. Whether the environment eventually joins that circle depends less on whether the idea is philosophically sound and more on whether the legal systems that adopt it can solve the hard problems of boundaries, representation, and enforcement that the early advocates tended to wave away.